Spearman's correlation coefficient yuav tsum muaj cov ntaub ntawv sib txawv rau ob qho tib si. Point-biserial correlation coefficient haum rau kuv hom ntaub ntawv, tab sis nws yog ib qho kev ntsuas ntsuas.
Puas yog kev sib txheeb parametric lossis nonparametric?
Ib qho kev sib raug zoo ntawm Pearson yog siv thaum ntsuas kev sib raug zoo ntawm ob qhov sib txawv tsis tu ncua. Lub tsis yog parametric sib npaugrau Pearson correlation yog Spearman correlation (ρ), thiab yog qhov tsim nyog thaum tsawg kawg ib qho ntawm qhov sib txawv yog ntsuas ntawm qhov ntsuas qhov ntsuas.
Puas yog kev sib txheeb parametric?
Spearman rank correlation: Spearman rank correlation is a non-parametric test uas yog siv los ntsuas qhov kev sib raug zoo ntawm ob qhov sib txawv.
Yog point-Biserial correlation?
Tus Point-Biserial Correlation Coefficient yog ib qho kev sib txheeb ntsuas ntawm lub zog ntawm kev sib koom ua ke ntawm qhov sib txawv ntawm qib tsis tu ncua (tus piv lossis cov ntaub ntawv luv luv) thiab qhov sib txawv binary. Binary variables yog variables ntawm nominal scale nrog tsuas yog ob tus nqi.
point-Biserial correlation siv rau dab tsi?
Taw qhia. A point-biserial correlation yog siv rau ntsuas lub zog thiab kev taw qhia ntawm lub koom haum uas muaj nyob nruab nrab ntawm ib qho kev sib txawv tsis tu ncua thiab ib qho sib txawv dichotomous.
Nonparametric Correlation: Point-Biserial Correlation (Dichotomous ~ Interval Variable) - Part 1
